configuration_policy_loader_win.h revision 3f50c38dc070f4bb515c1b64450dae14f316474e 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_LOADER_WIN_H_
6#define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_LOADER_WIN_H_
7#pragma once
8
9#include "base/synchronization/waitable_event.h"
10#include "base/win/object_watcher.h"
11#include "chrome/browser/policy/asynchronous_policy_loader.h"
12
13namespace policy {
14
15// Keeps watch on Windows Group Policy notification event to trigger a policy
16// reload when Group Policy changes.
17class ConfigurationPolicyLoaderWin
18    : public AsynchronousPolicyLoader,
19      public base::win::ObjectWatcher::Delegate,
20      public MessageLoop::DestructionObserver {
21 public:
22  ConfigurationPolicyLoaderWin(
23      AsynchronousPolicyProvider::Delegate* delegate,
24      int reload_interval_minutes);
25  virtual ~ConfigurationPolicyLoaderWin() {}
26
27 protected:
28  // AsynchronousPolicyLoader overrides:
29  virtual void InitOnFileThread();
30  virtual void StopOnFileThread();
31
32 private:
33  // Updates the watchers and schedules the reload task if appropriate.
34  void SetupWatches();
35
36  // Post a reload notification and update the watch machinery.
37  void Reload();
38
39  // ObjectWatcher::Delegate overrides:
40  virtual void OnObjectSignaled(HANDLE object);
41
42  // MessageLoop::DestructionObserver overrides:
43  virtual void WillDestroyCurrentMessageLoop();
44
45  base::WaitableEvent user_policy_changed_event_;
46  base::WaitableEvent machine_policy_changed_event_;
47  base::win::ObjectWatcher user_policy_watcher_;
48  base::win::ObjectWatcher machine_policy_watcher_;
49  bool user_policy_watcher_failed_;
50  bool machine_policy_watcher_failed_;
51
52  DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyLoaderWin);
53};
54
55}  // namespace policy
56
57#endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_LOADER_WIN_H_
58